diff --git a/packages/eslint-config-airbnb-base/rules/best-practices.js b/packages/eslint-config-airbnb-base/rules/best-practices.js
index 46fefab8..fa97fb68 100644
--- a/packages/eslint-config-airbnb-base/rules/best-practices.js
+++ b/packages/eslint-config-airbnb-base/rules/best-practices.js
@@ -176,8 +176,7 @@ module.exports = {
 
     // disallow certain object properties
     // http://eslint.org/docs/rules/no-restricted-properties
-    // TODO: enable, semver-major
-    'no-restricted-properties': ['off', {
+    'no-restricted-properties': ['error', {
       object: 'arguments',
       property: 'callee',
       message: 'arguments.callee is deprecated,'
@@ -187,10 +186,6 @@ module.exports = {
     }, {
       property: '__defineSetter__',
       message: 'Please use Object.defineProperty instead.',
-    }, {
-      object: 'Object',
-      property: 'assign',
-      message: 'Please use the object spread operator (...) instead.',
     }],
 
     // disallow use of assignment in return statement
diff --git a/packages/eslint-config-airbnb-base/rules/es6.js b/packages/eslint-config-airbnb-base/rules/es6.js
index efd5a15b..063ee2cf 100644
--- a/packages/eslint-config-airbnb-base/rules/es6.js
+++ b/packages/eslint-config-airbnb-base/rules/es6.js
@@ -109,8 +109,7 @@ module.exports = {
 
     // disallow parseInt() in favor of binary, octal, and hexadecimal literals
     // http://eslint.org/docs/rules/prefer-numeric-literals
-    // TODO: enable, semver-major
-    'prefer-numeric-literals': 'off',
+    'prefer-numeric-literals': 'error',
 
     // suggest using Reflect methods where applicable
     // http://eslint.org/docs/rules/prefer-reflect
diff --git a/packages/eslint-config-airbnb-base/rules/imports.js b/packages/eslint-config-airbnb-base/rules/imports.js
index b7065dd3..c4b350fc 100644
--- a/packages/eslint-config-airbnb-base/rules/imports.js
+++ b/packages/eslint-config-airbnb-base/rules/imports.js
@@ -107,8 +107,10 @@ module.exports = {
 
     // Ensure consistent use of file extension within the import path
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/extensions.md
-    // TODO: enable when https://github.com/benmosher/eslint-plugin-import/issues/390 is resolved
-    'import/extensions': ['off', 'never'],
+    'import/extensions': ['error', 'always', {
+      js: 'never',
+      jsx: 'never',
+    }],
 
     // Enforce a convention in module import order
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/order.md
@@ -136,13 +138,11 @@ module.exports = {
 
     // Forbid import of modules using absolute paths
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-absolute-path.md
-    // TODO: enable, semver-major
-    'import/no-absolute-path': ['off'],
+    'import/no-absolute-path': 'error',
 
     // Forbid require() calls with expressions
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-dynamic-require.md
-    // TODO: enable, semver-major
-    'import/no-dynamic-require': ['off'],
+    'import/no-dynamic-require': 'error',
 
     // prevent importing the submodules of other modules
     // https://github.com/benmosher/eslint-plugin-import/blob/master/docs/rules/no-internal-modules.md
diff --git a/packages/eslint-config-airbnb-base/rules/style.js b/packages/eslint-config-airbnb-base/rules/style.js
index 4349e135..a6617129 100644
--- a/packages/eslint-config-airbnb-base/rules/style.js
+++ b/packages/eslint-config-airbnb-base/rules/style.js
@@ -91,8 +91,7 @@ module.exports = {
 
     // require or disallow newlines around directives
     // http://eslint.org/docs/rules/lines-around-directive
-    // TODO: enable, semver-major
-    'lines-around-directive': ['off', {
+    'lines-around-directive': ['error', {
       before: 'always',
       after: 'always',
     }],
diff --git a/packages/eslint-config-airbnb-base/test/test-base.js b/packages/eslint-config-airbnb-base/test/test-base.js
index 7544a063..810c8000 100644
--- a/packages/eslint-config-airbnb-base/test/test-base.js
+++ b/packages/eslint-config-airbnb-base/test/test-base.js
@@ -7,6 +7,7 @@ import index from '../';
 const files = { ...{ index } }; // object spread is to test parsing
 
 fs.readdirSync(path.join(__dirname, '../rules')).forEach((name) => {
+  // eslint-disable-next-line import/no-dynamic-require
   files[name] = require(`../rules/${name}`); // eslint-disable-line global-require
 });